It failed when the first suspect arrested, Che Calhoun, turned out to have a solid alibi. He was at a Pearland convenience store at the time of the murder.

With the second suspect, Andre Jackson, authorities displayed a great deal of confidence at the time of his arrest.

At a news conference after Jackson’s arrest in June 2016, former Harris County District Attorney Devon Anderson said, “We have the right man.”

Houston Police Lt. John McGalin said, “We have the right guy.”

“We do have the right person,” HPD Sgt. Tommy Ruland said.

Josue Flores&#39; gravesite.

KHOU

But a year later, lab results quickly unraveled the case.

“The DNA evidence just kept falling apart,” Berg said. “We just could not get anything that was tied to (Jackson).”

Berg acknowledged the lack of DNA on Jackson was puzzling given the multiple stabbings and bloody murder scene.

Police were left with a circumstantial case against Jackson without any key forensic evidence. Investigators did gather several surveillance videos placing Jackson in the neighborhood the day of the murder; however, witnesses gave different descriptions of the man they saw near Josue just after the stabbing.

Court records show one witness said he was wearing a long black t-shirt and tan cargo pants. But another witness saw black pants and a white shirt. And yet another witness remembered a black muscle t-shirt and black pants.

“When we’re relying 100 percent on witness statements. We need those to be consistent and they weren’t,” Dupree said.